SrTiO3（  Strontium Titanate）

Strontium Titanate is an excellent and wide applied High Tc superconductive single crystalline substrate. Its lattice constant (3.905Å) fits the common high Tc superconductive material YBCO (3.88 Å) very well. It has twin-less crystal structure and very good physical and mechanical properties for film growth. It is suitable for various high Tc films such as YBCO, Bi-system, La-system and others. It is also suitable for different film growth technologies such as Magnet Sputtering, Pulsed Laser Deposition (PLD), Vapourization, MOCVD, CVD, and laser MBE etc. Films made by these materials and technologies on SrTiO3 substrate have excellent performance, for instance Tc > 90°K, Jc> = 106A/cm2.

Specifications

Standard Size:

              Ф25，20x20，10x10，10x5，10x3mm,or customer design.

Thickness:   0.5mm，1.0mm.

Thickness tolerance: ±0.02mm,

Or ±0.005mm for special order.

Polish:  one or two sides.

Orientation：＜100＞ ＜110＞ ＜111＞.

Orientation accuracy: ±0.5°

Edge Orientation accuracy: 2°

（or 1°for special order）

Cut with special tilt angle：

available(tilt angle:1°－45°)

Micro roughness Ra：≤5Å（5μm×5μm）

 

Crystal structure

cubic
m3m
Peroviskite

Cell parameter

a=3.905Å

（°K）
Melting point

2353

（g/cm3）
Density

5.117

（J/g·k）
Specific Heat

0.544(300°K)

（W/m·k）
Thermal conductivity

11.2

（x10-6k-1）
Thermal expansion

9.4

（εr）
Dielectric constant

300(295°K)
2000(80°K)
(7-15GHz)

（tgδ）

Dielectric loss

5x10-4(295°K)
2.5x10-4(80°K)
microwave

（Mohs）
Hardness

6-6.5

Growth Method

 flame